Homework Help: physics

Posted by Erika on Thursday, September 20, 2012 at 11:20am.

A heat engine has a hot reservoir of 680°C and a cold reservoir of 220°C. What is the efficiency of the engine?

physics - Elena, Thursday, September 20, 2012 at 4:40pm
T⒣=273+680=953K
T⒞ = 273+220=493K

η ==1- T⒞/T⒣=1 – (493/953)=0.483

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